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Unitized Piston, 56mm Bore for John Deere Skid Steers & Graders – AH140072

SKU:
AH140072
FitsModel:
240, 250, 317, 320, CT322, 620G/GP/P, 622G/GP/P, 670B/C/D/G/GP/P, 672D/G/GP/P, 770B/C/G/GP/P, 772B/G/P, 870D/G/GP, 872G/GP, 50G, 50 P, 60G, 60 P, ZAXIS 50U-5N, ZAXIS 60USB-5N
ListDescription:
Unitized Piston, 56mm Bore
Unitized Piston, 56mm Bore for John Deere Skid Steers & Graders – AH140072
Part # AH140072

Part # AH140072

Fits Models At A Glance:

  • John Deere Skid Steers & Compact Track Loaders — Bucket Cylinder:
    • 240, 250
    • 317, 320
    • CT322
  • John Deere Motor Graders — Front Steering Cylinder:
    • 620G, 620GP, 620 P-Tier
    • 622G, 622GP, 622 P-Tier
    • 670B, 670C, 670D, 670G, 670GP, 670 P-Tier
    • 672D, 672G, 672GP, 672 P-Tier
    • 770B, 770C, 770G, 770GP, 770 P-Tier
    • 772B, 772G, 772 P-Tier
    • 870D, 870G, 870GP
    • 872G, 872GP
  • John Deere Mini Excavators:
    • 50G, 50 P-Tier
    • 60G, 60 P-Tier
  • Hitachi Mini Excavators:
    • ZAXIS 50U-5N
    • ZAXIS 60USB-5N

Key Notes:

  • Part Number: AH140072
  • Weight: 0.80 lbs (0.36 kg)
  • Bore Diameter: 56 mm
  • Piston Dimensions: 56 mm bore × 32 mm counterbore × 20 mm; piston diameter 2.203 in
  • Pressure Rating: Up to 5,000 PSI
  • Type: Unitized piston — one-piece piston-and-seal assembly (steel body, non-metallic bearing, rubber loading ring, filled PTFE seal ring)
  • Origin: Made in USA
  • Cylinder Application: Bucket cylinder on the skid steers and CT322; front steering cylinder on the motor graders (steering cylinder generations vary by serial number — verify your serial)
  • Fitment Note: This piston is sized to the bore listed above. Before ordering, match your cylinder's bore and existing piston dimensions against the specs — the same machine uses different pistons in different cylinders

Common Use Case or Symptoms: Use when a cylinder is bypassing internally, drifting under load, or leaking past the piston — the unitized piston restores the internal seal without replacing the whole cylinder.

Why Choose Broken Tractor:

  • ✅ Covers John Deere and Hitachi Alike – one 56 mm piston serves skid steer bucket and grader steering cylinders plus ZAXIS mini excavators
  • ✅ Fast Shipping from a U.S.-Based Team – ready to ship from our U.S. warehouses
$84.00

Shipping calculated at checkout. If any item in your order is temporarily unavailable, we'll contact you to arrange a back-order or refund — whichever you prefer.

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Product: Category: Brand: Head Title: Unitized Piston 56mm | Broken Tractor | AH140072